<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.0/jquery.js"></script>
</head>
<body>
    <input type="text" id="input">
    <script>
           var arr = [
            "添加了附近你",
            "字符长度超过三位",
            "附近的好友",
            "你好"
        ]
        $("#input").keydown(function (e) {
            if(e.keyCode==13){
                var value = $(this).val()
                var newarr = arr.filter(item=>{
                    return item.includes(value);
                })
                var res = newarr.map(k=>{
                    if(k.length>3){
                        k = k.slice(0,3)+"..."
                    }
                    return k;
                })
                console.log(res);
                $(this).val('')
            }
          })
    </script>
</body>
</html>